CN202228202U - Cooling air channel structure for single-cylinder air-cooling air cylinder cover - Google Patents
Cooling air channel structure for single-cylinder air-cooling air cylinder cover Download PDFInfo
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- CN202228202U CN202228202U CN2011203488555U CN201120348855U CN202228202U CN 202228202 U CN202228202 U CN 202228202U CN 2011203488555 U CN2011203488555 U CN 2011203488555U CN 201120348855 U CN201120348855 U CN 201120348855U CN 202228202 U CN202228202 U CN 202228202U
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- cooling air
- cooling duct
- air channel
- nose bridge
- air
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Abstract
Provided is a cooling air channel structure for a single-cylinder air-cooling air cylinder cover. A built-in nose bridge portion cooling air channel is arranged at the nose bridge portion of the air cylinder cover, the lower end of the nose bridge portion cooling air channel is communicated with a vertical cooling air channel, the upper end of the nose bridge portion cooling air channel is communicated with a nose bridge air outlet, and a wind shield is arranged at an air outlet at the joint of a main cooling air channel and the nose bridge portion cooling air channel. Due to the nose bridge portion cooling air channel arranged on the main cooling air channel, cooling air from the main cooling air channel can partially flows into the nose bridge portion cooling air channel so as to take away heat of the nose bridge portion of the air cylinder cover. The wind shield is arranged at the position of the air outlet at the joint of the main cooling air channel and the nose bridge portion cooling air channel, thereby increasing air inlet amount entering the nose bridge cooling air channel, reducing temperature of the nose bridge portion of the air cylinder cover, and enabling whole temperature of the air cylinder cover to decrease by 10 DEG C to 15 DEG C. Thus, temperature difference of the air cylinder cover can be controlled within 25 DEG C, even parts of a needle valve of an oil injector are prevented from being clamped, and descending range of output power of a heating machine in running is smaller that 1%.
Description
Technical field:
The utility model relates to the four-cycle, single-cylinder air-cooled diesel engine, relates in particular to the cooling system of single-cylinder air-cooled diesel engine.
Background technique:
Compare with water-cooled diesel engine; Small air-cooled diesel engine has is convenient to realize advantage such as light and handyization, reliable operation, thermal efficiency height, wide accommodation, manufacturing be easy to maintenance; But because cylinder outer wall has only 1/40 of cooling water to the heat-transfer coefficient of cooling air heat radiation; Add positions such as the bridge of the nose district heat radiation difficulty of cylinder head, thereby caused air-cooled diesel engine to have higher heat load.Along with diesel engine develops to height reinforcement direction; Certainly will cause that engine heat load increases, make that the operating conditions of cylinder cover for diesel engine is harsh day by day, it had both born mechanical load; Bear heat load again; Contact down work through the high-temperature fuel gas of being everlasting with maximum temperature surpasses 2000K, though its outside contact with cooling air, owing to the temperature of cylinder head different parts has nothing in common with each other.The cylinder head high heat load zone of eddy cell type single-cylinder air-cooled diesel engine mainly comprises two positions, and one is the cylinder head bridge of the nose district that is surrounded by intake duct, air outlet flue, mounting hole of oil sprayer and vortex chamber, and another then is an air outlet flue.Because air outlet flue receives " heat is washed away " of the high-temp waste gas of discharging in the cylinder, the temperature of cylinder head air outlet flue one side is than higher; And can constantly suck ozone in the intake duct, and suck ozone cylinder is stamped " cold punching brush " effect, make the temperature of intake duct one side will be lower than the mean temperature of cylinder head; In addition, valve actuating push rod hole one side is away from the vortex chamber, and the oil lubrication cooling is arranged, and adds that push-rod hole one side is easy to the air inducing cooling, causes the temperature difference of push-rod hole one side and vortex chamber's one side bigger.Hence one can see that, reduce the operating temperature that the diesel engine heat load must reduce cylinder head, especially will reduce the temperature of cylinder head bridge of the nose district and air outlet flue.Because the operating temperature of existing diesel upper cylinder lid is higher, and temperature distributing disproportionation is even, and the temperature difference is bigger; Certainly lead to very big thermal stress; Under the effect repeatedly of thermal stress, the air valve seat ring, mounting hole of oil sprayer and the vortex chamber that are in bridge of the nose district form heat fatigue cracking easily, therefore; Must improve design to the cooling duct of cylinder head, the cooling air duct construction of cylinder head is very big to the diesel engine performance influence.
For example, the cylinder head majority of existing 170F diesel engine is the die casting mould aluminium cylinder head, in the bridge of the nose district of cylinder head, is provided with vortex chamber, inlet and outlet gate seat circle, inlet and outlet door tappet bore and mounting hole of oil sprayer; Structure is very compact, and existing technology is all thought and can't be forced cooling to this zone, only below air inlet seat ring and exhaust seat ring; The push-rod hole top is provided with main cooling duct, between two push-rod holes, is provided with sagging direct-cooled but air channel, and sagging direct-cooled but air channel and main cooling duct interlink; But there is not built-in pressure cooling duct in the bridge of the nose district of cylinder head, therefore, after the diesel engine work; The cylinder head heat load is high; The air inlet heating is serious, and the hot machine operation of diesel engine back power is obviously descended, and the fuel injector needle valve coupling that install on top, vortex chamber is heated excessive and stuck easily.How reducing air-cooled diesel engine cylinder head heat load is the important subject that improves the complete machine performance.
The model utility content:
The utility model provides a kind of cooling air duct construction of single-cylinder air-cooled cylinder head; It can reduce the heat load of single-cylinder air-cooled diesel engine cylinder head; Especially reduce the temperature in cylinder head bridge of the nose district; Reduce the temperature difference of cylinder head, the fuel injector needle valve coupling that prevents to be installed in top, vortex chamber reduces the fall of the output power of diesel engine under hot machine operation because of the excessive stuck phenomenon that produces of being heated.
The technological scheme of the utility model is:
A kind of cooling air duct construction of single-cylinder air-cooled cylinder head; Comprise main cooling duct and vertical cooling duct; Main cooling duct is positioned at the below of inlet valve port system and exhaust valve port system, the top of push-rod hole, and vertical cooling duct is between two push-rod holes; Vertical cooling duct and main cooling duct interlink; It is characterized in that: be provided with built-in bridge of the nose district cooling duct in cylinder head bridge of the nose district, the lower end of bridge of the nose district cooling duct interlinks with vertical cooling duct, and the upper end of bridge of the nose district cooling duct communicates with bridge of the nose air outlet.
Further, the exhaust outlet at main cooling duct and the cooling duct place of joining, bridge of the nose district is provided with barge board.
Further, the area of barge board is 20%～80% of a main cooling duct vent area.
Owing to set up built-in bridge of the nose district cooling duct in the bridge of the nose district of cylinder head; And bridge of the nose district cooling duct all interlinks with vertical cooling duct with main cooling duct; Like this; Cooling air by the diesel engine cooling fan produces is pressed air inlet road junction one side of importing cylinder head through the cooling duct band that wind scooper and body one side form, and cooling air is divided into three paths and respectively cylinder head is cooled off at this moment, and all goes out at air outlet flue one effluent of cylinder head.Article one, the path is a level master cooling duct; The second path is the lower air duct of enclosing from cylinder head lower end and following induced draft plate; The 3rd paths is the upper air duct of enclosing from cylinder head upper end and last induced draft plate; Wherein, The second cooling path is all identical with existing technology with the 3rd cooling path, and the cooling effect of first cooling path has had great improvement than existing technology, owing on main cooling duct, set up bridge of the nose district cooling duct; The lower end of bridge of the nose district cooling duct interlinks with vertical cooling duct; The upper end of bridge of the nose district cooling duct communicates with bridge of the nose air outlet, and some can flow into the bridge of the nose district cooling duct cooling air that gets into from main cooling duct like this, thereby the heat in cylinder head bridge of the nose district is taken away; If be provided with barge board at the exhaust outlet place at main cooling duct and the cooling duct place of joining, bridge of the nose district; Barge board then can suitably reduce the cooling air quantity of valve actuating push rod hole one side, has strengthened the air output that gets into bridge of the nose district cooling duct, so more can improve the radiating effect in cylinder head bridge of the nose district; Reduce the temperature in cylinder head bridge of the nose district, suitably improved the temperature of valve actuating push rod hole one side.Because the outside of air outlet flue directly contacts with air; Below air outlet flue, be provided with main cooling duct; The right side is provided with bridge of the nose district cooling duct, and the top directly contacts with air again, so the radiating condition at air outlet flue position also is improved; The cooling duct design of this cylinder head makes the bridge of the nose district of cylinder head and the temperature at air outlet flue position reduce significantly; The temperature of valve actuating push rod hole one side slightly raises, but the bulk temperature of cylinder head can descend 10 ℃～15 ℃, and the temperature difference of cylinder head can be controlled in 25 ℃.So just can prevent the fuel injector needle valve coupling because of the excessive stuck phenomenon that produces of being heated, the output power fall of diesel engine under hot machine operation is less than 1%.
Description of drawings:
Fig. 1 is the structural representation of the cylinder head of 170F single-cylinder air-cooled diesel engine;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the right elevation of Fig. 1;
Fig. 4 is the A-A sectional view among Fig. 1;
Fig. 5 is the B-B sectional view among Fig. 1, and arrow is the mobile direction of cooling air among the figure;
Fig. 6 is the sectional view of F-F among Fig. 2, the cut-away view of promptly main cooling duct and cooling duct confluce, bridge of the nose district, and arrow is the mobile direction of cooling air among the figure.
Among the figure, 1-inlet valve port system; 2-exhaust valve port system; 3-master's cooling duct; The vertical cooling duct of 4-; The 5-push-rod hole; The 6-mounting hole of oil sprayer; The 7-vortex chamber; 8-bridge of the nose district cooling duct; 9-bridge of the nose air outlet; The 10-barge board; The 11-intake duct; The 12-air outlet flue; The radiating fin of 13-air inlet side.
Embodiment:
Embodiment below in conjunction with description of drawings the utility model:
Fig. 1～Fig. 6 is the structural representation of the cylinder head of 170F type single-cylinder air-cooled diesel engine; Wherein, the cooling air duct construction of cylinder head comprises main cooling duct 3 and vertical cooling duct 4, main cooling duct 3 be positioned at inlet valve port be 1 with exhaust valve port be 2 belows; Push-rod hole 5 tops; Vertical cooling duct 4 is between two push-rod holes 5, and vertical cooling duct 4 interlinks with main cooling duct 3, is provided with built-in bridge of the nose district cooling duct 8 in cylinder head bridge of the nose district; The lower end of bridge of the nose district cooling duct 8 interlinks with vertical cooling duct 4; The upper end of bridge of the nose district cooling duct 8 communicates with bridge of the nose air outlet 9, and the exhaust outlet at main cooling duct 3 and cooling duct 8 places of joining, bridge of the nose district is provided with barge board 10, and the area of barge board 10 is 35% of main cooling duct 3 vent areas.
Owing to set up built-in bridge of the nose district cooling duct in the bridge of the nose district of 170F cylinder cover for diesel engine; Bridge of the nose district cooling duct 8 is through inlet valve ports are 1, exhaust valve port is 2, mounting hole of oil sprayer 6 and vortex chamber 7 surround bridge of the nose district; The heat load maximum region that runs through entire cylinder head; Cooling air is got into the main cooling duct 3 by the side of the radiating fin of air inlet side 13 guiding from intake duct 11, draws cooling air through barge board 10 then and gets into bridge of the nose district cooling duct 8, and it is inner to get into cylinder head; 9 flow out from bridge of the nose air outlet, and unnecessary cooling air goes out from air outlet flue one effluent along the original route of main cooling duct 3.This main cooling duct 3 is different with existing 170F cylinder cover for diesel engine; Adopt this cooling structure both to reduce high-temp waste gas through the heat radiation of air outlet flue 12 to cylinder head; Reduced inlet valve port again and be 1, exhaust valve port is 2, the heat load in bridge of the nose district between mounting hole of oil sprayer 6 and the vortex chamber 7, effectively reduces the cylinder head temperature, has improved the situation of the temperature distributing disproportionation of cylinder head; Help improving the performance index of diesel engine, strengthen the reliability and the life-span of diesel engine.Simultaneously, but, reduced the weight of cylinder head, be more conducive to the realization of diesel engine lightweight target owing to offered bridge of the nose district cooling duct 8 material-saving material.Test result shows that it can effectively reduce the heat transmission of waste gas, and the bulk temperature of cylinder head can descend 10 ℃～15 ℃, and the temperature difference of cylinder head can be controlled in 25 ℃.So just can prevent the fuel injector needle valve coupling because of the excessive stuck phenomenon that produces of being heated, the output power fall of diesel engine under hot machine operation is less than 1%, and existing technology reaches 10%～25%.
The utility model is applicable to the cylinder head of all single-cylinder air-cooled diesel engines, as long as set up the protection domain that all technological schemes that built-in bridge of the nose district cooling duct forces to cool off all belong to the utility model through the bridge of the nose district in cylinder head.
Claims (3)
1. the cooling air duct construction of a single-cylinder air-cooled cylinder head; Comprise main cooling duct (3) and vertical cooling duct (4); Main cooling duct (3) is positioned at the below of inlet valve port system (1) and exhaust valve port system (2), the top of push-rod hole (5), and vertical cooling duct (4) is positioned between two push-rod holes (5); Vertical cooling duct (4) interlinks with main cooling duct (3); It is characterized in that: be provided with built-in bridge of the nose district cooling duct (8) in cylinder head bridge of the nose district, the lower end of bridge of the nose district cooling duct (8) interlinks with vertical cooling duct (4), and the upper end of bridge of the nose district cooling duct (8) communicates with bridge of the nose air outlet (9).
2. according to the cooling air duct construction of the said single-cylinder air-cooled cylinder head of claim 1, it is characterized in that: the exhaust outlet at main cooling duct (3) and bridge of the nose district cooling duct (8) place of joining is provided with barge board (10).
3. according to the cooling air duct construction of the said single-cylinder air-cooled cylinder head of claim 1, it is characterized in that: the area of barge board (10) is 20%～80% of main cooling duct (a 3) vent area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203488555U CN202228202U (en) | 2011-09-17 | 2011-09-17 | Cooling air channel structure for single-cylinder air-cooling air cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203488555U CN202228202U (en) | 2011-09-17 | 2011-09-17 | Cooling air channel structure for single-cylinder air-cooling air cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228202U true CN202228202U (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203488555U Expired - Fee Related CN202228202U (en) | 2011-09-17 | 2011-09-17 | Cooling air channel structure for single-cylinder air-cooling air cylinder cover |
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| Country | Link |
|---|---|
| CN (1) | CN202228202U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926885A (en) * | 2012-11-29 | 2013-02-13 | 河南创世电机科技有限公司 | Universal minitype petrol motor cylinder cover |
-
2011
- 2011-09-17 CN CN2011203488555U patent/CN202228202U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926885A (en) * | 2012-11-29 | 2013-02-13 | 河南创世电机科技有限公司 | Universal minitype petrol motor cylinder cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140917 |
|
| EXPY | Termination of patent right or utility model |